King Adult-Blanket: Size, Gauge and Yarn Amount

At king-bed scale, this is the largest single project this site's calculators cover — the yarn total below is worth reading as a real budgeting and planning number well before the first stitch, not a figure to discover partway through.

Dimensions

This page works from 108 by 90 inches — a generous king-bed dimension with real overhang on the wider sides, bigger than every other blanket size charted on this site.

Cast-on

Multiplying 108 inches by 4.5 stitches per inch gives 486. That sits two stitches past the nearest clean multiple of 4, so the corrected foundation is 484 stitches — though for a piece this wide, many crafters work it in sections or strips rather than one continuous foundation of that length in the first place. See the modular construction note below, and verify the raw arithmetic against your own swatch before starting, using the Cast-On Calculator.

Yarn amount

The single largest yarn figure anywhere on this site: 15,405 yards (14,005 base yards plus a 10% allowance), from the Yarn Quantity Estimator at double crochet. That's computed at the same fine reference gauge explained on the throw-size page — not a typical relaxed dc tension, kept only for comparability across this site's blanket sizes — so re-checking your own real gauge matters more here than at any smaller size before this number becomes a purchasing target.

Modular construction stops being optional in any practical sense here

At 108 inches wide, working one continuous piece in a single sitting-sized project is genuinely impractical for most people — the sheer bulk and weight of the growing fabric becomes difficult to manage well before the piece is anywhere near finished. Strips joined lengthwise, or a full grid of granny squares or other motifs, are the far more common approach at this size specifically because they keep each individual working session's piece small and manageable, deferring the bulk-management problem to one joining session near the end rather than carrying it through the entire project.

Before committing to a project this size

Confirm dye-lot availability for the full quantity before starting — over 15,000 yards is enough that a sold-out or discontinued batch discovered weeks or months into the project is a real risk worth checking against up front. Consider, too, whether a slightly smaller size (the full/queen page) meets the actual need just as well; the jump in yarn, time, and cost from full/queen to king is substantial, and it's worth confirming the extra size is genuinely needed before committing to it.

Other adult blanket sizes

Throw, Twin, and Full-Queen are all a step down in scale from this one.

FAQ

Is a king-size blanket a realistic solo project, or is it more commonly a collaborative one? Both are common — some crafters work the entire piece solo over an extended timeline, while others treat a project this size as a genuinely collaborative one, especially for a modular design where different people can work individual motifs to a shared gauge and size before they're all joined together.

How much does a wrong gauge estimate actually cost at this scale, in practical terms? More than at any smaller size on this site — a gauge that's meaningfully off from this page's reference figures, multiplied across 15,000-plus yards, can mean thousands of yards of shortfall or surplus, which is exactly why weighing an actual swatch rather than trusting a gauge-model estimate matters most at this specific scale.

Is there a smaller alternative that still covers a king bed adequately? A well-draped full/queen-size blanket can work as a decorative bed topper on a king bed without covering every edge, if full edge-to-edge coverage isn't a strict requirement — worth considering against the substantial extra yarn, time, and cost this page's full king dimensions represent.